token approval breaking on app.uniswap.org

[r0ohafza]

Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Describe the bug

I am trying to do a USDC to ETH swap on uniswap and the initial token approval although goes through on chain but it breaks the multi step transaction flow on uniswap.

You will need to make sure that the token you are selling does not already have the approval to trigger this flow.

Where did this happen?

https://app.uniswap.org/

Steps To Reproduce

1. Ensure you have a token without any approval on the uniswap app.
2. Swap the ERC20 token to ETH.
3. You will get an approval transaction on the porto dialog.
4. Once you submit it uniswap will throw a failed to approve dialog.

Operating System

macOS

Operating System version

15.6.1

Browser

Chrome

Browser version

141.0.7390.123

Password Manager

iCloud Keychain (passkeys)

Passwоrd Manager version

15.6.1

Reproduction Device & Environment

{
"browser": {
"name": "Chrome",
"version": "141.0.0.0",
"major": "141"
},
"cpu": {},
"device": {
"model": "Macintosh",
"vendor": "Apple"
},
"engine": {
"name": "Blink",
"version": "141.0.0.0"
},
"os": {
"name": "macOS",
"version": "10.15.7"
}
}

Anything else?

No response